Illuminating unit and display apparatus

Abstract

An illuminating unit includes: a plurality of light sources; a light-guide plate including an end surface disposed to face the plurality of light sources, a first surface that outputs light which is based on incident light from the end surface, and a second surface that faces the first surface and includes a plurality of convex parts; and an optical sheet adhered to side of the second surface of the light-guide plate, with the plurality of convex parts being interposed therebetween. The plurality of convex parts include a plurality of first convex parts disposed in a first region inside the second surface, and one or plurality of second convex parts disposed in at least a portion of a second region on a periphery of the first region inside the second surface.

1 . An illuminating unit comprising:
 a plurality of light sources;   a light-guide plate including an end surface disposed to face the plurality of light sources, a first surface that outputs light which is based on incident light from the end surface, and a second surface that faces the first surface and includes a plurality of convex parts; and   an optical sheet adhered to side of the second surface of the light-guide plate, with the plurality of convex parts being interposed therebetween, wherein   the plurality of convex parts include
 a plurality of first convex parts disposed in a first region inside the second surface, and 
 one or plurality of second convex parts disposed in at least a portion of a second region on a periphery of the first region inside the second surface. 
   
     
     
         2 . The illuminating unit according to  claim 1 , wherein a size of a planar shape of or disposition density of the one or plurality of second convex parts in the second surface varies depending on a distance from the light sources. 
     
     
         3 . The illuminating unit according to  claim 2 , wherein
 the planar shape of the one or plurality of second convex parts is linear, broken-line shaped, or wavy in at least the portion of the second region of the light-guide plate, and   a width of the planar shape becomes larger as being closer to the light sources.   
     
     
         4 . The illuminating unit according to  claim 2 , wherein
 the plurality of second convex parts are provided,   each planar shape of the plurality of second convex parts in the second surface is circular or polygonal, and   a diameter of each planar shape of or the disposition density of the plurality of second convex parts becomes larger as being closer to the light sources.   
     
     
         5 . The illuminating unit according to  claim 1 , wherein the one or plurality of second convex parts are disposed in the second region to surround the first region. 
     
     
         6 . The illuminating unit according to  claim 1 , wherein
 the plurality of second convex parts are provided,   the second raised part, of the plurality of second convex parts, disposed in a region distant from the light sources is disposed to surround the first region, and   the second raised part, of the plurality of second convex parts, disposed in a region in proximity to the light sources is disposed in a selective region depending on a position of the light sources.   
     
     
         7 . The illuminating unit according to  claim 1 , wherein each of the first convex parts and each of the one or plurality of second convex parts include a same material as each other. 
     
     
         8 . The illuminating unit according to  claim 7 , wherein
 the plurality of second convex parts are provided,   a planar shape of each of the first convex parts and the second convex parts in the second surface is circular or polygonal, and   a diameter of the planar shape of each of the first convex parts and a diameter of the planar shape of each of the second convex parts are same as each other.   
     
     
         9 . The illuminating unit according to  claim 1 , wherein
 the plurality of first convex parts include a plurality of third convex parts and a plurality of fourth convex parts, the third convex parts and the fourth convex parts having diffusivities that are different from each other,   the diffusivity of each of the third convex parts is larger than the diffusivity of each of the fourth convex parts,   a size of a planar shape of or disposition density of the plurality of third convex parts in the second surface becomes larger as being away from the light sources, and   a size of a planar shape of or disposition density of the plurality of fourth convex parts in the second surface becomes smaller as being away from the light sources.   
     
     
         10 . The illuminating unit according to  claim 9 , wherein each planar shape of the third convex parts and the fourth convex parts in the second surface is circular or polygonal. 
     
     
         11 . The illuminating unit according to  claim 1 , wherein the first convex parts and the one or plurality of second convex parts each include an adhesive material that allows the light-guide plate and the optical sheet to be adhered together. 
     
     
         12 . The illuminating unit according to  claim 1 , further comprising an adhesive layer provided between each of the first convex parts and the one or plurality of second convex parts and the optical sheet. 
     
     
         13 . An illuminating unit comprising:
 a plurality of light sources;   a light-guide plate including an end surface disposed to face the plurality of light sources, a first surface that outputs light which is based on incident light from the end surface, and a second surface that faces the first surface and includes a plurality of convex parts; and   an optical sheet adhered to side of the second surface of the light-guide plate, with the plurality of convex parts being interposed therebetween, wherein   the plurality of convex parts include a plurality of third convex parts and a plurality of fourth convex parts, the third convex parts and the fourth convex parts having diffusivities that are different from each other,   the diffusivity of each of the third convex parts is larger than the diffusivity of each of the fourth convex parts,   a size of a planar shape of or disposition density of the plurality of third convex parts in the second surface becomes larger as being away from the light sources, and   a size of a planar shape of or disposition density of the plurality of fourth convex parts in the second surface becomes smaller as being away from the light sources.   
     
     
         14 . A display apparatus comprising:
 a display panel; and   an illuminating unit that illuminates the display panel,   the illuminating unit including   a plurality of light sources,   a light-guide plate including an end surface disposed to face the plurality of light sources, a first surface that outputs light which is based on incident light from the end surface, and a second surface that faces the first surface and includes a plurality of convex parts, and   an optical sheet adhered to side of the second surface of the light-guide plate, with the plurality of convex parts being interposed therebetween, wherein   the plurality of convex parts include
 a plurality of first convex parts disposed in a first region inside the second surface, and 
 one or plurality of second convex parts disposed in at least a portion of a second region that is a peripheral region of the first region inside the second surface. 
   
     
     
         15 . A display apparatus comprising:
 a display panel; and   an illuminating unit that illuminates the display panel,   the illuminating unit including   a plurality of light sources,   a light-guide plate including an end surface disposed to face the plurality of light sources, a first surface that outputs light which is based on incident light from the end surface, and a second surface that faces the first surface and includes a plurality of convex parts, and   an optical sheet adhered to side of the second surface of the light-guide plate, with the plurality of convex parts being interposed therebetween, wherein   the plurality of convex parts include a plurality of third convex parts and a plurality of fourth convex parts, the third convex parts and the fourth convex parts having diffusivities that are different from each other,   the diffusivity of each of the third convex parts is larger than the diffusivity of each of the fourth convex parts,   a size of a planar shape of or disposition density of the plurality of third convex parts in the second surface becomes larger as being away from the light sources, and   a size of a planar shape of or disposition density of the plurality of fourth convex parts in the second surface becomes smaller as being away from the light sources.